Kyoto Animation: Megane-hen is apparently a commercial by Kyoto Animation promoting the series Kyoukai no Kanata of the same studio.

There is nothing much to say about the story since the commercial doesn't say anything about it. The art and animation though is very well done as expected as well as the music. Although the story doesn't tells us much the emotions of the characters are good enough to leave an impression.

Overall if I haven't watched Kyoukai no Kanata and watched this first I would definitely watch the series afterward. :)